Gallery: Antares rocket explodes

These narrated videos show the pre-launch preparations that readied the United Launch Alliance Atlas 5 rocket and the Orbital ATK Cygnus commercial cargo-delivery spacecraft for flight and rolling to Complex 41 for liftoff to the International Space Station.

The Atlas 5 rocket emerges from the Vertical Integration Facility for rollout to Complex 41 at Cape Canaveral in preparation to launch the Orbital ATK Cygnus resupply ship to the International Space Station. Liftoff is set for Thursday at 5:55 p.m. EST.

Racing against the clock to meet the Trump administration’s 2024 deadline to land astronauts on the moon, NASA plans to select Northrop Grumman to build a pressurized habitation module derived from the company’s Cygnus cargo craft for living quarters for crews transiting to and from the lunar surface.